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"There is zero evidence a bird came from a dinosaur."

From talk origins- Evidence for dino bird transition-

There is zero evidence a bird came from a dinosaur.""Transitional" does not mean "ancestral." It means that the transitional fossil shows a mosaic of features from organisms before and after. It is wrong to say that Archaeopteryx was ancestral to modern birds. But it is also wrong to say that it is not transitional. It is indisputable that Archaeopteryx is intermediate between dinosaurs and modern birds. That makes it transitional and gives evidence of the relatedness between dinosaurs and birds.

Several other recently discovered dinosaur, bird, and intermediate dinosaur/bird fossils are starting to fill in the gaps and are providing further evidence that the interpretation of Archaeopteryx was correct.

Many new bird fossils have been discovered in the last couple decades, revealing several intermediates between theropod dinosaurs (such as Allosaurus) and modern birds:

Sinosauropteryx prima. A dinosaur covered with primitive feathers, but structurally similar to unfeathered dinosaurs Ornitholestes and Compsognathus [Chen et al. 1998; Currie and Chen 2001].

Ornithomimosaurs, therizinosaurs and oviraptorosaurs. The oviraptorosaur Caudipteryx had a body covering of tufted feathers and, on wings and tail, feathers with a central rachis [Ji et al. 1998]. Feathers are also known from the therizinosaur Beipiaosaurus [Xu et al. 1999a]. Several other bird-like characters appear in these dinosaurs, including unserrated teeth, highly pneumatized skulls and vertebrae, and elongate wings. Oviraptorids also had birdlike eggs and brooding habits [Clark et al. 1999].

Deinonychosaurs (troodontids and dromaeosaurs). These are the closest known dinosaurs to birds. Sinovenator, the most primitive troodontid, is especially similar to Archaeopteryx [Xu et al. 2002]. Byronosaurus, another troodontid, has teeth nearly identical to primitive birds [Makovicky et al. 2003]. Microraptor, the most primitive dromaeosaur, is also the most birdlike; specimens have been found with undisputed feathers on their wings, legs and tail [Hwang et al. 2002; Xu et al. 2003]. Sinornithosaurus also was covered with a variety of feathers and had a skull more birdlike than later dromaeosaurs [Xu et al. 1999b, 2001; Xu and Wu 2001].

Protarchaeopteryx, alvarezsaurids, Yixianosaurus and Avimimus. These are birdlike dinosaurs of uncertain placement, each potentially closer to birds than deinonychosaurs. Protarchaeopteryx has tail feathers, uncompressed teeth and an elongate manus (hand/wing) [Ji et al. 1998]. Yixianosaurus has an indistinctly preserved feathery covering and hand/wing proportions close to birds [Xu and Wang 2003]. Alvarezsaurids [Chiappe et al. 2002] and Avimimus [Vickers-Rich et al. 2002] have other bird-like features.

Archaeopteryx. This famous fossil is defined to be a bird, but it is actually less birdlike in some ways than some genera mentioned above [Paul 2002; Maryanska et al. 2002].

Shenzhouraptor [Zhou and Zhang 2002], Rahonavis [Forster et al. 1998], Yandangornis and Jixiangornis. All these birds are slightly more advanced than Archaeopteryx, especially in characters of the vertebrae, sternum, and wing bones.

Sapeornis [Zhou and Zhang 2003], Omnivoropteryx, and confuciusornithids (e.g. Confuciusornis and Changchengornis) [Chiappe et al. 1999]. The first birds to possess large pygostyles (bone formed from fused tail vertebrae). Other new bird-like characters include seven sacral vertebrae, a sternum with a keel (some species), and a reversed hallux (hind toe).

Enantiornithines, including at least 19 species of primitive birds such as Sinornis [Sereno and Rao 1992; Sereno et al. 2002], Gobipteryx [Chiappe et al. 2001] and Protopteryx [Zhang and Zhou 2000]. Several birdlike features appeared in enantiornithines, including twelve or fewer dorsal vertebrae, a narrow V-shaped furcula (wishbone), and reduction in wing digit bones.

Patagopteryx, Apsaravis and yanornithids [Chiappe 2002; Clarke and Norell 2002]. More birdlike features appeared in this group, such as changes to vertebrae and development of the sternal keel.

Hesperornis, Ichthyornis, Gansus and Limenavis. These birds are almost as advanced as modern species. New features include loss of most teeth and changes to leg bones.

Modern birds.
References:
Chen, P., Z. Dong and S. Zhen, 1998. An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China. Nature 391: 147-152.
Chiappe, L. M., 2002. Osteology of the flightless Patagopteryx deferrariisi from the Late Cretaceous of Patagonia (Argentina). In Chiappe and Witmer, pp. 281-316.
Chiappe, L. M. and L. M. Witmer (eds.), Mesozoic Birds: Above the Heads of Dinosaurs. Berkeley: Univ. of California Press.
Chiappe, L. M., M. A. Norell and J. M. Clark, 2001. A new skull of Gobipteryx minuta (Aves: Enantiornithes) from the Cretaceous of the Gobi Desert. American Museum Novitates 3346: 1-15. http://diglib1.amnh.org/novitates/i0003-0082-346-01-0001.pdf
Chiappe, L. M., M. A. Norell and J. M. Clark, 2002. The Cretaceous, short-armed Alvarezsauridae. In: Chiappe and Witmer, pp. 87-120.
Chiappe, L. M., S. Ji, Q. Ji and M. A. Norell, 1999. Anatomy and systematics of the Confuciusornithidae (Theropoda: Aves) from the Late Mesozoic of northeastern China. Bulletin of the American Museum of Natural History 242: 1-89. http://diglib1.amnh.org/bulletins/i0003-0090-242-01-0001.pdf
Clark, J. M., M. A. Norell and L. M. Chiappe, 1999. An oviraptorid skeleton from the Late Cretaceous of Ukhaa Tolgod, Mongolia, preserved in an avianlike brooding position over an oviraptorid nest. American Museum Novitates 3265: 1-36.
Clarke, J. A. and M. A. Norell, 2002. The morphology and phylogenetic position of Apsaravis ukhaana from the late Cretaceous of Mongolia. American Museum Novitates 3387: 1-46. http://diglib1.amnh.org/novitates/i0003-0082-3387-01-0001.pdf
Currie, P. J. and P. Chen, 2001. Anatomy of Sinosauropteryx prima from Liaoning, northeastern China. Canadian Journal of Earth Sciences 38: 1705-1727.
Forster, C. A., S. D. Sampson, L. M. Chiappe and D. W. Krause, 1998. The theropod ancestry of birds: New evidence from the Late Cretaceous of Madagascar. Science 279: 1915-1919.
Hwang, S. H., M. A. Norell, Ji Q. and Gao K., 2002. New specimens of Microraptor zhaoianus (Theropoda: Dromaeosauridae) from northeastern China. American Museum Novitates 3381: 1-44. http://research.amnh.org/users/sunny/hwang.et.al.2002.pdf
Ji, Q., P. Currie, M. A. Norell and S-A. Ji, 1998. Two feathered dinosaurs from northeastern China. Nature 393: 753-761.
Makovicky, P. J., M. A. Norell, J. M. Clark and T. Rowe, 2003. Osteology and relationships of Byronosaurus jaffei (Theropoda: Troodontidae). American Museum Novitates 3402, 1-32. http://diglib1.amnh.org/novitates/i0003-0082-3402-01-0001.pdf
Maryanska, T., H. Osmólska and M. Wolsan, 2002. Avialan status for oviraptorosauria. Acta Palaeontologica Polonica 47(1): 97-116. http://app.pan.pl/acta47/app47-097.pdf
Paul, Gregory S., 2002. Dinosaurs of the Air. Baltimore: Johns Hopkins University Press.
Sereno, P. C. and C. Rao, 1992. Early evolution of avian flight and perching: New evidence from the Lower Creates of China. Science 255: 845-848.
Sereno, P. C., C. Rao and J. Li, 2002. Sinornis santensis (Aves: Enantiornithes) from the Early Cretaceous of Northeastern China. In: Chiappe and Witmer, pp. 184-208.
Vickers-Rich, P., L. M. Chiappe and S. Kurzanov, 2002. The enigmatic birdlike dinosaur Avimimus portentosus. In: Chiappe and Witmer, pp. 65-86.
Xu, X. and X. Wang, 2003. A new maniraptorian dinosaur from the Early Cretaceous Yixian Formation of Western Liaoning. Vertebrate Palasiatica 41(3): 195-202.
Xu, X. and X-C. Wu, 2001. Cranial morphology of Sinornithosaurus millenii Xu et al. 1999 (Dinosauria: Theropoda: Dromaeosauridae) from the Yixian Formation of Liaoning, China. Canadian Journal of Earth Sciences 38: 1739-1752.
Xu, X., Z. Tang and X. Wang, 1999a. A therizinosaurid dinosaur with integumentary structures from China. Nature 399: 350-354.
Xu, X., X-L. Wang and X-C. Wu, 1999b. A dromaeosaur dinosaur with a filamentous integument from the Yixian Formation of China. Nature 401: 262-266.
Xu, X., Z. Zhou and R. O. Prum, 2001. Branched integumental structures in Sinornithosaurus and the origin of feathers. Nature 410: 200-204.
Xu, X., M. A. Norell, X. Wang, P. J. Makovicky and X. Wu, 2002. A basal troodontid from the Early Cretaceous of China. Nature 415: 780-784.
Xu, X., Z. Zhou, X. Wang, X. Kuang, F. Zhang and X. Du, 2003. Four-winged dinosaurs from China. Nature 421: 335-340. http://www.cals.ncsu.edu/course/zo501/4WingedDino.pdf
Zhang, F. and Z. Zhou, 2000. A primitive enantiornithine bird and the origin of feathers. Science 290: 1955-1959.
Zhou, Z. and F. Zhang, 2002. A long-tailed, seed-eating bird from the Early Cretaceous of China. Nature 418: 405-409.
Zhou, Z. and F. Zhang, 2003. Anatomy of the primitive bird Sapeornis chaoyangensis from the Early Cretaceous of Liaoning, China. Canadian Journal of Earth Sciences 40: 731-747.
Further Reading:
Paul, Gregory S., 2002. Dinosaurs of the Air. Baltimore: Johns Hopkins University Press.

Chiappe, L. M. and G. J. Dyke, 2002. The Mesozoic radiation of birds. Annual Review of Ecology and Systematics 33: 91-124. (technical)

Dingus, L. and T. Rowe, 1997. The mistaken extinction: dinosaur evolution and the origin of birds. New York: Freeman and Company.

Padian, K. and L. M. Chiappe, 1998. The origin of birds and their flight. Scientific American 278(2) (Feb.): 38-47.

Looks like there is a lot of evidence to me. I guess you just thought there was no evidence because you didn't check the science.